It would be cool if both suggestions were added

I don't like either suggestion

Suggestion 1. Being able to set what language is allowed to join a team(Iron ranked perk)

What I am sick of is advertising I'm a english team but then several dutch/spanish/netherlands players join my team and all hopes of team coordination are destroyed, especially in 2 to 3 player games because of that language barrier so what I suggest to fix it is simple. Have a plugin for iron ranked Donators(and higher) that allows them to set what language can join and if the plugin detects that the client trying to join doesn't speak the required language a message will pop up saying "Your language is not allowed on this team". However since at most there is about like 1-3 donators in a server at a time I suggest having stone ranked players be able to set a preferred language on their team that would say in a little text next to their team(insert language here) prefered and unteamed players who fit the required language would preferably be matched into the preferd language

Suggestion 2. A simple invite to team only system(Lapiz ranked perk)

Of the more simple suggestion of mine is just being able to invite friends to your team if you're a Lapiz or higher donator. If you have a group of friends, the last thing you want is some random person joining your team forcing you to pick a different team with your friends as well as forcing you to join a match extra early for a empty team spot. The perk would only be active however when the person with the perk is the first person to join a empty team that has no players

Suggestion 1 could be difficult for cubecraft to create different lobbies/games/teams for different languages. I understand that its annoying, but what if theres only one dutch player in the lobby, and then he's got all of the other language players against him. I believe that segregating players shouldn't be a thing, Cubecraft is about playing together, no matter what.

Being able to set what language is allowed to join a team(Iron ranked perk)

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While this may not be againt the EULA, it poses issues.
1. This is impossible to code, and even if it was some words are similar. For example , "basketball" in French is "basketball". IT's THE EXACT SAME!